package com.my.study.tcp;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author: yidujun
 * @create: 2021/04/10 16:15
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    private static final Logger LOGGER = LoggerFactory.getLogger(NettyClientHandler.class);

    /**
     * 当通道就绪就会触发该方法
     * @param ctx
     * @throws Exception
     */
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        LOGGER.info("client {}", ctx);
        ctx.writeAndFlush(Unpooled.copiedBuffer("hello, server: (>^ω^<)喵", CharsetUtil.UTF_8));
    }

    /**
     * 当通道有读取事件时，会触发
     * @param ctx
     * @param msg
     * @throws Exception
     */
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf) msg;
        LOGGER.info("服务器回复的消息：{}, 服务器的地址：{}", buf.toString(CharsetUtil.UTF_8), ctx.channel().remoteAddress());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        super.exceptionCaught(ctx, cause);
    }
}
